D. A. Zazymkina, D. F. Aminev, V. S. Krivobok, Yu. V. Korostelin, V. I. Kozlovsky
{"title":"Low-temperature photoluminescence of CdTe:Fe single crystals for tunable lasers operating in mid-infrared spectral range","authors":"D. A. Zazymkina, D. F. Aminev, V. S. Krivobok, Yu. V. Korostelin, V. I. Kozlovsky","doi":"10.1007/s10946-024-10227-0","DOIUrl":null,"url":null,"abstract":"<div><p>We study low-temperature photoluminescence of CdTe:Fe single crystals in the near-IR range at Helium temperatures. We establish that doping with 4 · 10<sup>18</sup> cm<sup>−3</sup> iron concentration leads to a decrease of the band gap by 8 ± 1 meV compared to non-doped CdTe. We show that, in the spectral range of 1.2–1.6 eV, the luminescence of crystals is mainly defined by Hydrogen-like donors and two types of acceptors with binding energies of 149 ± 5 meV and 45 ± 2 meV. In addition, we detect the luminescence bands with maxima of 1.1 eV and 0.95 eV in the longer wavelength region. The characteristic decay time for each of the bands is 0.386 ms at 7 K. The observed bands are ascribed to intracenter luminescence corresponding to the <sup>3</sup>T<sub>1</sub>(<sup>3</sup>H) → <sup>5</sup>E(<sup>5</sup>D) and <sup>5</sup>T<sub>2</sub>(<sup>5</sup>D) → <sup>5</sup>E(<sup>5</sup>D) transitions between Fe<sup>2+</sup>-ion inner shells. Detection and identification of these bands allows the use of the near-IR range for the study of optically active iron ions in promising laser media based on CdTe:Fe.</p></div>","PeriodicalId":663,"journal":{"name":"Journal of Russian Laser Research","volume":"45 4","pages":"404 - 410"},"PeriodicalIF":0.7000,"publicationDate":"2025-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Russian Laser Research","FirstCategoryId":"101","ListUrlMain":"https://link.springer.com/article/10.1007/s10946-024-10227-0","RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"OPTICS","Score":null,"Total":0}
引用次数: 0
Abstract
We study low-temperature photoluminescence of CdTe:Fe single crystals in the near-IR range at Helium temperatures. We establish that doping with 4 · 1018 cm−3 iron concentration leads to a decrease of the band gap by 8 ± 1 meV compared to non-doped CdTe. We show that, in the spectral range of 1.2–1.6 eV, the luminescence of crystals is mainly defined by Hydrogen-like donors and two types of acceptors with binding energies of 149 ± 5 meV and 45 ± 2 meV. In addition, we detect the luminescence bands with maxima of 1.1 eV and 0.95 eV in the longer wavelength region. The characteristic decay time for each of the bands is 0.386 ms at 7 K. The observed bands are ascribed to intracenter luminescence corresponding to the 3T1(3H) → 5E(5D) and 5T2(5D) → 5E(5D) transitions between Fe2+-ion inner shells. Detection and identification of these bands allows the use of the near-IR range for the study of optically active iron ions in promising laser media based on CdTe:Fe.
期刊介绍:
The journal publishes original, high-quality articles that follow new developments in all areas of laser research, including:
laser physics;
laser interaction with matter;
properties of laser beams;
laser thermonuclear fusion;
laser chemistry;
quantum and nonlinear optics;
optoelectronics;
solid state, gas, liquid, chemical, and semiconductor lasers.